M4.7 earthquake 12 km NNE of Ayd?n, Turkey
A magnitude 4.7 earthquake struck 12 km NNE of Ayd?n, Turkey on Fri, Oct 28, 1977, 12:43 AM GMT+2 (22:43 UTC), 24 km (15 mi) below the surface.
A larger quake followed: M5.3 7 km ENE of ?zmir, Turkey. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (ms), light
- Local time
- UTC
- 1977-10-27 22:43:32 UTC
- Depth
- 24.0 km (14.9 mi), shallow
- Epicenter
- 37.957° N, 27.882° E
- Region
- Turkey
- Strongest shaking
- IV, light shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Peak ground acceleration
- 4.4% of gravity
- Peak ground velocity
- 0.4 cm/s
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 90
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 7 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.08 km N of Ayd?n, Turkey · 17862 days ago · 33 km deep · 6 km away
- 4.013 km SW of Bademli, Turkey · 17862 days ago · 12 km deep · 7 km away
- 4.010 km SSW of Tire, Turkey · 17848 days ago · 33 km deep · 16 km away
- 3.911 km NNE of Ayd?n, Turkey · 17835 days ago · 10 km deep · 2 km away
- 3.56 km NNE of ?ncirliova, Turkey · 17833 days ago · 10 km deep · 12 km away
- 4.65 km ESE of Karaba?lar, Turkey · 17819 days ago · 19 km deep · 74 km away
- 5.37 km ENE of ?zmir, Turkey · 17812 days ago · 34 km deep · 79 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000r8k (also filed as iscgem692394, iscgemsup692394). Read Tue, Sep 22, 2026, 12:14 PM UTC.